Rainbow Dash was always a loyal Wonder Bolt but she was also a Loyal marefriend to AppleJack but when an old enemy returns from Rainbow and Equestria's past will she be able to keep her marefriend out of danger or will danger find them.

Donut Joe keeps his store open on Hearth’s Warming Eve. And why not? He doesn’t have anywhere else to be, and neither do the tired, bitter ponies who find their way inside. But the Eve is young, and strange things lie ahead...

After being expelled from the Wonderbolts Academy, Lightning Dust traveled around Equestria in search of herself. Then, many years later, after a hard day of working she went to a bar and ran into the last pony she ever expected to meet again.

Humanity's space exploration ultimately took the form of billions of identical probes, capable of building anything (including astronauts themselves) upon arrival at their destinations. One lands in Equestria. Things go downhill from there.